rate_dataset::matchup

Source: dataset/rate/rate_dataset__matchup.pro

 rate_dataset::matchup
        Determine which streams can be combined with which others for
        the purposes of ratio or spectral index plots.

 Usage:
        mclass = dsref -> matchup()

 Keyword:
        Index                   If set, then do the comparison for
                                spectral index calculations rather
                                than for simple ratios. 
        ephemeris       output  A named variable which  will contain
                                whether the streams have ephemeris
                                data.

 Notes:
        streams with the same mclass can be combined, provided mclass
        >= 0, streams with negative mclass cannot be combined with any
        other streams. The mclass values need not be a contiguous set
        of values (in fact they won't be), you should only compare
        them for equality with other streams.

 History:
        Original: 14/7/00; SJT
        Plugged memory leak: 16/4/02; SJT